Adjustable trestle.



PATENT-ED JAN. 15, 1907.

W. L. MILNER. ADJUSTABLE TRESTLE. APPLICATION FILED APR. 12, 1906.

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JNVENTOR:

WITNESSES:

ATTORNEY.

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PATENTED JAN. 15, 1907.

W. L. MILNBR. ADJUSTABLE TRESTLE. APPLIOATION'FILED APR.12,1906.

2 SHEETS-SHEET z INVENTOR;

4 I ATTORNEY IVILLIAM L. MILNER, OF INDIANAPOLIS, INDIANA.

ADJUSTABLE TRESTLE.

Specification of Letters Patent.

Patented Jan. 15, 1907.

Application filed April 12, 1906. Serial No. 311,278.

This invention relates to trestles of the class that may be used by wall decorators, carpenters, plasterers, or by paper-hangers or other artisans for supporting temporary platforms, tables, or bench boards or for other purposes, the invention having reference particularly to knockdown trestles that may be adjusted in both vertical and horizontal directions.

Objects of the invention are to provide improved trestles which may be adjusted readily and be adapted for use for many purposes, and which may be quickly set up and knocked down, and which may be conveniently packed or hauled from place to place in small parts that may be carried in light wagons or carriages to or from the work that may be required to be done, other objects being to provide strong, reliable, and economical adjustable trestles.

With the above-mentioned and minor objects in view the invention consists in an ad justable knockdown trestle or horse comprising two pairs of legs that are adjustable as to length, each pair of legs having a verticallyadjustable pillar connected therewith, provided with a bifurcated head, a beam supported by the bifurcated heads and secured detachably thereto, and braces connected to the beam and to parts of the legs; and the invention consists, further, in the novel parts and in the combinations and arrangements of parts, as hereinafterparticularly described, and pointed out in the appended claims.

Referring to the drawings, Figure 1 is side elevation of one of the improved trestles assumed to be arranged with another similar trestle with a platform of planks upon them; Fig. 2, an end elevation of one of the trestles and a sectional view of the other one at the middle of its beam part, one pair of legs thereof being seen in elevation; Fig. 3, a fragmentary horizontal sectional view on the line A A in Fig. 2; Fig. 4, a fragmentary vertical sectional view of one of a pair of legs at the middle of its pillar; Fig. 5, a fragmentary view of the pillar, showing the head thereof in section; Fig. 6, a perspective view of the pillar; Fig. 7, a fragmentary view of one of the braces for the legs with part thereof in section; Fig. 8, a fragmentary horizontal sectional view as on the line B B in Fig. 4, and Fig. 9 a fragmentary front elevation of a pillar and guide with a pair of the adjustable legs shown in section connected thereto.

Similar reference characters in the different figures of the drawings designate corresponding elements or features.

In a practical embodiment of the invention a complete trestle or horse comprises two supports, as at C and D, a beam E, mounted upon the supports, and a pair of angle-braces F and G, and another like trestle havin su )orts as C and beam E usu- O I J ally is employed therewith, there being a suitable number of boards or planks H placed on the beams, as in Figs. 1 and 2. The beams are detachable from the supports and braces, and it is designed that the beams ably be found in the lumber provided for erecting or repairing buildings, so that usually the workman will be required to carry only the supports of the trestles with him to or from his work. alike, and, if desired, there may be three or more of them attached to a single beam when a very large or strong platform may be required.

Each support of a trestle comprises a guide I, having aguide-groove a in its front face (the guide being a connector for a pair of legs, as will further appear) and a pillar J, that is fitted movably in the groove a, so as to be capable of adjustment longitudinally, the pillar having a suitable number of notches b in its front face for its support, the notches being out under, so that there are projections 10 and 11 at opposite sides of each notch to hold a loop K, which is connected to the up per end of the guide I by means of a pivot 00 and movable into or out of either one of the notches when the pillar is properly adjusted thereto.

head (1, having a recess e, is attached to the upper end of the pillar, the head being pro vided with a clamping-screwy. A stop-yoke g is attached to the guide I and extends 'may consist of such timbers as may invari- The supports are all The lower end of the pillar has a stop projection 0 attached thereto, and a an integral bolt end i, on which is a nut y'.

across the pillar J to be engaged by the proj ection 0 when the pillar may have been eleva'ted as high as it may have been designed to be raised in the guide. The recess 6 is of suitable proportions to receive the beam E or E, which may be securedto the head dby the screw f.

A pair of short arms h and h are attached to opposite sides of the guide I, near theltop thereof, preferably by means of an integral bar 12, that extends across the back of the guide and is suitably secured rigidly thereto. A pair of relatively long arms L and L are attached to the lower end part of the guide I, preferably by means of an integral bar m, that extends across the back of the guide and is suitably secured thereto, each arm having A pair of legs M and M are secured at their upper ends on the arms h and h and at their lower parts on the bolt ends i of the longer arms for supporting the guides, the leg diverging from the upper ends thereof at opposite sides of the guide. The legs have springlatches N attached to the inner sides thereof, each latch having a latch-pin 0 connected thereto and extending through the leg, and.

the legs are provided with adjustable parts that are pivoted on the bolt ends '2' and held by the nuts j, there being a part P connected to the leg M and a part P connected to the leg'M, the parts I and P having each a socket is at an end thereof and a socket Z near the middle thereof to receive the latch-pins O.

The brace F or G is a rod provided at one end thereof with a hook n for engaging a loop' Q, that is-attached to the guide I, preferably by means of the bar m, the opposite end. of the brace having a journal p, on which a head g is rotatively attached, the head having a recess 1" therein and provided with a clamping-screw s for holding the head to the beam E or E. The swiveled head g may be reversed, so that the screw 8 may always be accessible.

In practical use the trestle may be adjusted for use under a low ceiling by shortening the legs, as shown in Fig. 9, where the part P is folded up against the main part M, and also the pillar may be adjusted by swinging the loop K out of one notch b and placing it in another notch of the pillar. For higher ceilings or for other situations the legs may be extended as in Fig. 2 and as one leg is shown in Fig. 9. The trestle may be quickly knocked down and contracted into small the guide-groove and having notches to re' ceive the pivoted loop, a brace connected detachably to the fixed loop, two pairs of arms secured to the guide, and a pair of legs attached to the arms. j

2. An adjustable trestle including supports comprising each a guide having a guidegroove therein and provided with a pivoted loop, a pillar movable in the guide-groove and having notches to receive the loop, a pair i of short arms secured to the guide, a pair of relatively long arms secured to the guide and having a loop attached thereto adjacent to the guide, a pair of legs attached to the arms and having adjustable parts connected therewith, and a brace connected. detachably to the loop that is attached to the arms.

3. An adjustable trestle-support compris- 1 ing a guide having a guide-groove therein and provided with a pivoted loop, 'a pillar movable in the guidegroove and having notches to receive the loop, two pairs of arms secured to the guide, a pair of legs attached to the arms and provided with latches and also with adjustable parts .pivoted thereto andhaving sockets to receive the latches.

4. An adjustable trestle comprising a beam, supports comprising each a guide having a guidegroove therein and provided with a pivoted loop and also a fixed loop, a pillar movable in the guidegroove and having notches to receive the pivoted. loop, two pairs of arms secured to the guide, a pair of legs attached to the arms and provided with latches and also with adjustable parts pivoted thereto and having sockets to receive the latches, a bifurcated head attached to the pillar to receive the beam, a binding-screw connected to the head, a brace having a hook connected detachably to the fixed loop, a recessed head swiveled to the brace, and a clamping-screw connected to the recessed head.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM L. MILNER.

Witnesses RONALD A. FOSTER, E. T. SILVINS. 

